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supergranulation cell
[ soo-per-gran-yuh-ley-shuhn ]
noun
, Astronomy.
- one of a number of large convection cells in the photosphere and chromosphere of the sun, each having a diameter of 10,000–20,000 miles (16,000–32,000 km) and lasting longer than a day.
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Word History and Origins
Origin of supergranulation cell1
First recorded in 1970–75; super- + granulation
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